I just can’t bring myself to except B press. I’ve tried but have seen more failures than success story’s . I mean for cleanliness of the system sure it’s great but it’s not that hard to purge during the brazing. And then there is the constant temperature cycling of the pipe work. That’s surely the unknown factor when you hear the comparison between b press water and b press fridge. In regards to the flow restriction I’m thinking not a concern, maybe the chance for noise from the gas flow but time will tell.
We have a Vrf heat recovery system with the RLS press fittings 5 years ago the factory welds on the FC are leaking all the press fittings have been great, Its all installation practices,
Mate, I still can't get myself over the line with press fittings (just yet). Enjoyed the video, nice to see your project there from start to finish. #betterhvac
Would be interesting to see the percentage of deformation on smaller pipe press fittings. Those 3/4" ones would only be a few percent reduced, but a 3/8" with a press might be a 15% reduction in internal diameter.
I’d forgotten they recommend to weld HD tails onto the units copper before using crimps. Something about the copper being thinner so it deforms more? I’ll need to go look that up again.
@@hvacraustralia 💯 correct! Well I do it always, weld a dickie bit off the end and then crimp. Speaking of crimps I had one the ones I put in 2years ago leak and I ended up cutting it out and welding in some elbows. More to the story I sent it back to actrol and they passed it onto manufacture for Warranty claim to they replied 'yess we're well aware of this it's a common issue with that fitting' umm wtf?? That's all they said to that! Seems to me like it's a fault with the crimp in the 90 elbow in 7/8
Setting it to 912 on sw4 opens all the EEVs and solenoids so no charge can get caught in between 2 valves, right? Something from TAFE was to never vac a unit with power still connected, but i assume the CityMulti can isolate anything that would short out.
912 is for Pump Down mode, not evacuation/recovery. The Mitsi Heat Recovery only have two pipes so you’re able to pull from both sides. They don’t even have an option to open all the valves/LEV’s.
@@hvacraustralia ive got a mitsi vrf two pipe leak find to do soon. If you can’t put the system into recovery mode then what about all the valves in the branch box?
Maybe the O-Ring in the Fitting was not the right one for refrigerant. Here in Germany there are M-Press fittings (brand is Conex Banninger, but with HNBR O-rings for all sorts of Refrigerants.
I recently gone out on my own, but I have worked for Mitsubishi Electric in the past and I still sub-contract out to their commissioning team. But yes, anyone can get access to the software and plug in. It does take a lot of work to understand the data but once you do they’re a lot of fun to work on.
In Mitsubishi’s case, the BC is what allows them to have a heat recovery that only uses two pipes. It has a liquid/gas separator, multiple LEV’s and solenoids. It’s pretty cool.
Mate if you and the family ever decide to move to Brisbane feel free to reach out. My company pays the highest and will take you on any day of the week.
so curious about the actual life cycle of press fittings....one side of me is positive because it saves time...other side hoping i will have retired by the time they all start failing🤣
I love the idea of them, but I think I’d still prefer to weld if I was installing at this stage. Being on the service side I only really see them when they fail so that probably doesn’t help my opinion much 😂
Doesn't it really suck how the customer ends up footing the bill for the incompetence of workmanship and stupid new technology that is B press fitting in refrigeration systems. The customer paid top dollar for that install, only to have to put in a service call for it not performing some time after. It should run flawlessly for at least 10 years and should never have a gas leak if it was plumbed the right way. I'd forget that b press garbage and do it the old fashioned way with oxy and silver solder. It will last forever.
I just can’t bring myself to except B press. I’ve tried but have seen more failures than success story’s .
I mean for cleanliness of the system sure it’s great but it’s not that hard to purge during the brazing.
And then there is the constant temperature cycling of the pipe work. That’s surely the unknown factor when you hear the comparison between b press water and b press fridge.
In regards to the flow restriction I’m thinking not a concern, maybe the chance for noise from the gas flow but time will tell.
I love the idea of them, but I only really see them when they fail being on the service side only. I also enjoy welding so that’s a factor too 😂
We have a Vrf heat recovery system with the RLS press fittings 5 years ago the factory welds on the FC are leaking all the press fittings have been great, Its all installation practices,
I love the idea of them. I only see them when they fail being, on the service side of things, so that probably doesn’t help my opinion.
Mate, I still can't get myself over the line with press fittings (just yet). Enjoyed the video, nice to see your project there from start to finish. #betterhvac
I’m the same. If I was installing them my guy would still go for welding. Love the ideal of them though. Glad yours enjoying the videos mate. Cheers.
Would be interesting to see the percentage of deformation on smaller pipe press fittings. Those 3/4" ones would only be a few percent reduced, but a 3/8" with a press might be a 15% reduction in internal diameter.
I’m really curious about this. I think you’re right, be interesting to see the deformation on the inside of a smaller diameter pipe.
Id say that crimp leaked under temperature and crimping straight onto the branch box that close is a no no need to weld hard drawn tails off the end
I’d forgotten they recommend to weld HD tails onto the units copper before using crimps. Something about the copper being thinner so it deforms more? I’ll need to go look that up again.
@@hvacraustralia 💯 correct! Well I do it always, weld a dickie bit off the end and then crimp. Speaking of crimps I had one the ones I put in 2years ago leak and I ended up cutting it out and welding in some elbows. More to the story I sent it back to actrol and they passed it onto manufacture for Warranty claim to they replied 'yess we're well aware of this it's a common issue with that fitting' umm wtf?? That's all they said to that! Seems to me like it's a fault with the crimp in the 90 elbow in 7/8
Setting it to 912 on sw4 opens all the EEVs and solenoids so no charge can get caught in between 2 valves, right? Something from TAFE was to never vac a unit with power still connected, but i assume the CityMulti can isolate anything that would short out.
912 is for Pump Down mode, not evacuation/recovery. The Mitsi Heat Recovery only have two pipes so you’re able to pull from both sides. They don’t even have an option to open all the valves/LEV’s.
@@hvacraustralia ive got a mitsi vrf two pipe leak find to do soon. If you can’t put the system into recovery mode then what about all the valves in the branch box?
Maybe the O-Ring in the Fitting was not the right one for refrigerant. Here in Germany there are M-Press fittings (brand is Conex Banninger, but with HNBR O-rings for all sorts of Refrigerants.
This fitting was rated for R410a but I’m sure the wrong fitting situation does happen more than I’d like to know about 😂
So do you work for Mitsubishi or are you a contractor ?
Can anyone get access to the Mitsubishi software and do what you do on the laptop ?
I recently gone out on my own, but I have worked for Mitsubishi Electric in the past and I still sub-contract out to their commissioning team. But yes, anyone can get access to the software and plug in. It does take a lot of work to understand the data but once you do they’re a lot of fun to work on.
What is a 'Branch Box'? Is that another term for the indoor unit of the aircon?
Only installed on VRFs, they are designed to allow the correct amount of refrigerant flow to each I/D connected on that branch.
In Mitsubishi’s case, the BC is what allows them to have a heat recovery that only uses two pipes. It has a liquid/gas separator, multiple LEV’s and solenoids. It’s pretty cool.
Mate if you and the family ever decide to move to Brisbane feel free to reach out. My company pays the highest and will take you on any day of the week.
I’ll never say never 😂 thanks mate.
What company pays the highest? Cheers
@@hvacraustralia Are you Sydney based ?
@@tonymontana897 Based in Melbourne. I have travelled to Sydney for work once and the traffic almost killed me 😂
Its just like flares. If done right, press fittings dont leak. Not proper deburring and they will leak.
so curious about the actual life cycle of press fittings....one side of me is positive because it saves time...other side hoping i will have retired by the time they all start failing🤣
I love the idea of them, but I think I’d still prefer to weld if I was installing at this stage. Being on the service side I only really see them when they fail so that probably doesn’t help my opinion much 😂
I'm not a fan of crimped fittings on AC pipework, brazing, then maybe compression.
Doesn't it really suck how the customer ends up footing the bill for the incompetence of workmanship and stupid new technology that is B press fitting in refrigeration systems.
The customer paid top dollar for that install, only to have to put in a service call for it not performing some time after. It should run flawlessly for at least 10 years and should never have a gas leak if it was plumbed the right way.
I'd forget that b press garbage and do it the old fashioned way with oxy and silver solder. It will last forever.
100%. You still see systems 25-30 years old still working nicely in the field. When they’re installed and maintained correctly they just keep going.